The following is a collection of Tamagotchi Connection Version 3 Codes. If I’m missing any, please let me know.

AABBCACB: Cost: 2800 Points.
This code will give you the Remote Control Car. It will appear under the Items menu. You can have your Tamagotchi play with this item.

CACABABC: Cost: 2500 Points.
This code will give you a Stuffed Animal. It will appear under the Items menu. This code will make your Tamagotchi character dress up like Nyatchi. (Japanese P2 character)

ACBBBACC: Cost: 400 Points.
This code will give you the Hairgel item. It will appear under the Items menu. When used it will give your Tamagotchi character a funky hairstyle.

ABBAACBA: Cost: 600 Points.
This code will make the Cake item appear in the Snacks menu. Your Tamagotchi can eat this.

BCABACBC: Cost: 800 Points.
This code will make the Steak item appear in the Meal menu. Your Tamagotchi can eat this.

CBACCABC: Cost: 4000 Points.
This code will give you the Cuckoo Clock. It will appear under the Items menu. When used near the top of the hour, it will make a cute Cuckoo animation and sound.

BCBCCABA: Cost: 2000 Points.
This code gives the Love Potion. The love potion is very important. When your Tamagotchi boy and girl reaches the age of 7, they will need to become good friends before they can have children. Typically this involves connecting several times to build up the friendship up to four happy faces all the way up to four hearts. Sometimes there’s simply not enough time to do this. So this is where the Love Potion comes in handy. First you feed this item to one of the adult Tamagotchi and than connect the two Tamagotchi. Select Visit. It should only take once or so and the Love Potion should make your Tamagotchi fall in love. I did not have to use the Love Potion on both of my adults, but if it doesn’t work you may want to try that.

Secret Item:
The is a Costume. It looks sort of like a Batman costume. You can access the Costume from the Items menu. See information below for details on obtaining this item.

How to use these codes: Go to the shop and press the “A” button (left button) several times. Eventually the shop keeper will get a shocked expression on his face. At this time start entering the key combinations above. You will only hear beeps as you enter the codes. The left button is “A” the middle button is “B” and the right button is “C”.

If you enter the code exactly than you will get the item associated with the code. The first time you enter these codes you will not have to pay any Gotchi Points. But be prepared, any times after your first free one and you must have the Gotchi Points to be able to obtain these items again.

Secret Item: There is a small trick to this. When you enter all of the codes in a row, the last 7th code you enter will not yield the item I have listed above. Instead you will get a secret item – the costume. To get the 7th item you will need to enter it again.

now for v4 codes

. BBCA CCCA= Pen= 15,000gp (found in US V4 instruction sheet)

2. ACAB ACAC= Steak= 1,400gp

3. BAAB ACBA= !! (clone)= 14,000gp

4. CCBA AABB= Honey (love potion)= 7,000gp

5. CAAA BACB= CD3= 0gp

~If you enter all five shop codes, the last code you enter will not give you what the code is for! Instead, it will give you a RARE CELL PHONE. If you would still like to get the last item from the last code, you will have to re-enter the code and buy it. I recommend entering the code for “CD3″ last because it is free!
now for v5

A visitor has pointed out how to get the four pure families. You get them by setting the particular bonding level before your tamas reach adulthood. So here is how you get Mametchi, Memetchi, Furawatchi and Kutchipatchi:To get Mametchi you need a male Tama and train him with Smart items until you reach 80-100% bonding. If you get 100% bonding, and mate him with Chantotchi you’ll have the pure Mame family.to get Kutchipatchi you need to train a male child with the Easy-Going items until you reach 80-100% bonding. If you get 100% bonding, and mate Kutchipatchi with Yonepatchi., you’ll have the pure Kutcipa family.to get Memetchi you need to train a female child with the Cheerful items until you reach 80-100% bonding. If you get 100% bonding, and mate Memetchi with Mumutchi, you’ll have the pure Meme family.
to get Furawatchi/Violetchi you need to train a female child with the smart items until you reach40%-70% bonding. If you get 100% bonding, and mate Furawatchi with Sukatchi, you’ll have the pure Violet family.

That’s it! Big thanks for everyone who made a contribution for this post :)